where can I find something to fit over an AC vent?

[TwinShadows]

I saw a picture where a AC vent attachement was used. It allowed 2 hoses like for a dryer to flow the air to the light fixture. Who sales things like that? That was pretty cool.

[Zandor]

Most any hydro store will sell air cooled hoods. eBay has them too, look for Kool Tubes.